Trail Running Tools

Race Time Predictor

Finish time

Index, distance, gain, last year's winner. Optimistic, realistic, conservative.

Course Readiness Score

Training read

Weekly miles, vert, kit, and the work this course asks. A score against Course DNA.

GAP Calculator

Grade-adjusted pace

Minetti model. Flat-equivalent effort on any slope.

Pace Converter

Units

min/km, min/mi, km/h, mph. Splits to 100K.

Running Pace Calculator

Finish times

Target pace to finish times from 1 mile to 300. Race landmarks and ±30s bands.

Incline Calculator

Grade & effort

Energy cost and flat-equivalent pace for any gradient.

Treadmill Incline Calculator

Elevation gain

Treadmill grade and distance to trail vert. Or target vert to belt miles.

Weekly Vert Calculator

Vert density

Ft per mile, long-run vert, and weekly bands from Course DNA.

Cutoff Buffer Calculator

Checkpoints

Target finish to aid station buffer. Green, amber, red at every gate.

Stair Climbing Calculator

Indoor vert

Steps and step height to elevation gain. Stadium laps or StairMaster floors.

Trail Finish Time Calculator

Finish estimate

Flat pace plus distance and vert to trail finish time. Entry to the full predictor.

Performance Index Calculator

Trail index

Score any finish 0–1000 vs world records. Vert, surface, weather, and fatigue.

Shoe Finder

Trail shoes

Terrain, race goals, preferences. Ranked matches from PR Run Verified catalog.

FIT File Viewer

Garmin, Coros, Wahoo

Open any .fit file in the browser. Map, profile, HR, pace, cadence. Convert to GPX.

Race Effort Estimator

km-effort

ITRA effort, unofficial index, UTMB stone tier from any finish.

Nutrition Calculator

Fueling

Calories, carbs, fluid, sodium per hour for your race.

Drink Mix Builder

DIY mix

Osmolality, carb ratio, brand presets for your bottle.

Aid Station Planner

Checkpoints

Arrival times by km-effort. Cutoff margins and hiking flags.

Race Conditions Simulator

Environment

Heat, altitude, and night penalties on your base finish time.

Course Replay

Course intel

Historical weather hour by hour on your race timeline. Segment crux flags and adjusted finish range.

GPX Explorer

Course map

Upload GPX. Branded map, elevation profile, gradient heatmap.

Route Studio

Route builder

Draw a trail route. Snap to path. Live distance, vert, and grade. Export GPX.

PR Poster

Print your run

Turn a GPX into a black-and-white poster. Single course or a year of runs. SVG or 300 DPI PNG.